Book/Report

FZJ-2018-01523

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A constant heat flux plasma limiter for Textor

Mioduszewski, P. (Corresponding author)FZJ*

1980
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/17516

Report No.: Juel-1681

Abstract: In future large tokamak machines heat removal from the plasma is going to play an important rol . In TEXTOR /1/ the total plasma power is expected to be in the range of 0.5 - 2.5 MW. Typical fractions of about 50% of this total power have to be removed from the plasma by limiters. The power flux from the limiter scrape-offlayer to the limiter surface decays rapidly with distance into the scrape-off layer resuiting in a highly space-dependent heat load on the limiter. Therefore, limiters are shaped in a way to smooth off the heat load, and the ideal limiter shape should produce a constant heat flux over the whole limiter surface. The ideally shaped limiter offers a better chance to handle the high heat loads with the preferred materials like stainless steel (or inconel 625 as in the case of TEXTOR). In addition, a constantheat flux to the limiter surface facilitates limiter diagnostic observations. If, e. g. the limiter surface temperature is measured with infrared techniques, the application of appropriate heat conduction formalisms yields the corresponding heat fluxes. The procedure becomes rather simple for constant heat flux because onedimensional,heat conduction equations can be applied. At present, the main problem is the lack of knowledge on the scrape-off layer characteristics.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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